Self-centering axle-lathe.



PATENTED NOV. l5, 1904.

K. VON BOECKMANN.

APPLIOATION FILED JAN. 19, 1904.

SELF GENTERING AXLE LATHE.

No MODELL UiviTED STATES Patented November 15, 1904.

KURT VON BOECKMANN, OF AUSTIN, TEXAS.

SELF-CENTERING AXLE-LATHE.

SPECIFGATON forming part of Letters Patent N o. 774,825, dated November15, 1904.' Application filed January 19, 1904. Serial No. 189,730. (Nomodel.)

To @ZZ whom, t may concern.-

Beit known that I, KURT VON BOECKMANN, acitizen of the United States,residing at Austin, in the county of Travis and State of Texas,

have invented new and useful Improvements.

in Self-Centering Axle-Lathes, of which the followingl is aspecification.

My invention has relation to self-centering axle-lathes; and it consistsin the novel construction and arrangement of its parts, as hereinaftershown and described.

The object of the invention is to provide a lathe for cutting oif theend of the axle and also cutting back the nut-shoulder. As it isessential that the surfaces at these two points should be parallel andthat'the nut-shoulder should be cut with uniform depth, it is essentialthat the lathe during the process of cutting be located concentric Withrelation to the longitudinal axis of the axle. To accomplish this, thelathe is provided with a centering means located at the end thereof andadapted to engage an intermediate portion of the axle and position theend of the lathe concentrically with relation to the intermediateportion of the axle. The lathe is also provided with a means forengaging the center of the end of the axle and concentricallypositioning an intermediate portion of the said lathe with relation tothe end of the axle. Between the two said means the lathe is providedwith a means which is adapted to positively engage the axle and maintainthe proper relative position between the said axle and the lathe. Thelathe is provided with a rotatable cutter head carrying suitable toolswhich are adapted to to cut the axle end and the nut-shoulder. Asuitable means is provided 'for rotating said cutter-head, and a meansis also provided for moving said cutter-head longitudinally independentof the rotary cutting movement of the cutter-head.

In the accompanying drawings, Figure 1 is a longitudinal sectional viewof the self-centering axle-lathe applied to the end of an axle. Fig. 2is a transverse sectional view cut on the line 2 2 of Fig. 1. sectionalview of the lathe, cut on the line 3 3 of Fig. 1; and Fig'. 4 is a faceview of the cutter-head.

Fig. 3 is a transverse f The lathe consists of the spiders 1 and 2, eachbeing provided with an open center and said spiders being' securedtogether by means of the bolts 3 3. The outer face of the spider 1 isprovided with the annular portion 4, which surrounds the central openingof the said spider. The outer surface of the said portion 4 is circular.The pins 5 5 extend radially through the said portion 4, each pin beingattached to a spring 6 one end of which is attached to the inner surfaceof the said portion 4. The tension of the said 'spring 6 is such as tohave a tendency to spread the said pins 5 away from each other. The ring7 surrounds the portion 4 and is provided in its inner face with thecam-recesses 8, which receive the outer ends of the pins 5. The bottoms9 ofthe said recesses 8 are formed on lines extending substantiallytangential to the outer surface of the portion 4. The said ring 7 isprovided With a set-screw 9, the inner end of which is adapted' to comein contact with the outer surface of the portion 4. The sides of thering 7 are provided with the plates 10 10, which prevent the said ringfrom becoming dislocated with relation to the pins 5 5.

The spider 1 is provided with the radiallyextending threaded bolts 1111, the inner ends of which are adapted to engage the axle 12 andpositively hold the lathe in fixed position with relation to the saidaxle.

The spider 2 is internally threaded, as at 13, in its central opening,and the externallyf threaded sleeve 14 engages the said thread 13. Thecollar 15 is journaled within the sleeve 14 and is provided at itsout-er end with a crank-handle 16. The cutter-head 17 is located betweenthe spiders 1 and 2 and is attached to the sleeve 15. The saidcutter-head 17 carries the tools 18 and 1 9, which are adapted to cutthe nut-shoulder' and the end o f the axle 12. The centering-pin 2Opasses .through the sleeve 15 and is adapted to engage the end of theaxle 12.

In applying the lathe the axle 12 is slipped between the inner ends ofthe pins 5. The

ring 7 is then turned in the direction of the arrow shown in Fig. 2, andthe bottoms 9 of the recesses 8 force the pins 'against the ten- IOOsion of the spring 6 in engagement with the axle 12, and thus the end ofthe axle-lathe is concentrically located with relation to theintermediate portion of the axle 12. The setscrew 9 is then tightenedand the ring 7 is held in position with relation to the portion 4E. Theinner end of the pin 2O is then placed in the center of the end of theaxle 12, and

said cutter-head 17 rotates the tools 18 and 19 cut the nut-shoulder andend or' the axle.

The cutter-head 17 may be moved longitudinally by turning' the sleeve14.

Having described my invention, what 1 claim as new, and desire to secureby Letters Patent, is

An axle-lathe consisting of a spider, a means fol concentricallylocating said spider with relation to the axle, a second spider attachedto the lirst said spider and having a means for concentrically locatingthe second said spider with relation to the axle consisting of alongitudinally-movable pin passing therethrough, a sleeve threaded insaid second spider, a collar journaled in said sleeve, a cutter-headattached to said collar, said pin passing through said collar.

1n testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

KURT voN BoEcKMANN.

Vitnesses:

E. C. DYER, E. S. CLUCK.

